I have a Platinum //e listed on eBay right now with what I think is a reasonable "buy it now" price. Includes the extended 80 column card and the 5.25" Drive Controller card... Tested and working. Not in brand new condition, but typical of what you expect for a 30 year old computer. Power supply board upgraded with one of the ReActive boards. All the keys and the rubber feet are there. I've had it listed a couple months and no bites on it.
Seems like a year or two ago this would have sold easy by now. Not looking for lowball offers or people telling me I'm a terrible person for not giving it away for free. I'm basically making nothing on this given what I paid for it and not even considering the time put into replacing broken key switches and the power supply board.